Smoke-consuming furnace



(No Model.) 4

- G. W. MEARS.

7 SMOKE GONSUMING FURNAGE.

N0. s07,970.- Patented Nov. 11., 1884.

Ill

mg esm I .lizz/e zzfm GEORGE MEARS, OF NORYVALK, OHIO.

SMOKE-CONSUMING FURNACE.-

SPECIFICATION forming part of Letters Patent No. 307,970, dated November11, 1884.

Application filed April 19, 1884. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE W. Means, of N orwalk, in the county of Huronand State of Ohio, have invented new and useful Improvements inSmoke-Consuming Furnaces, of which the following is a description.

The invention above alluded to is intended more especially forsteam-boiler furnaces, but which, however, is applicable to furnacesused forother purposes. 4

The construction of the above-said smokeconsumer and the practicaloperation of the same are substantially as follows, and illustrated inthe accompanying drawings, making a part of this specification, inwhich- Figure 1 represents a plan view of the inside of a furnace andthe appliance for consuming the smoke adapted thereto. Fig. 2 is alongitudinal vertical section of the same. Figs. 3 and i aredetached-sections.

Like letters of reference refer to like parts in the several views.

As shown in the drawings, A represents the body of a stea1n-b0ilerfurnace, which in its general structure may be like that class offurnaces in ordinaryuse. B is the fireplace, O the grate-bars, D theash-pit, E, the crown or arch of the fire-place,-and P a section, of asteam-boiler, all of which is or may be, as above said, similar tosteam-boiler furnaces in general use.

At the rear end of the furnace, and above the crown or arch E, is ahot-air chamber, G,

shut off from the fire-place by the partitionwall H and by that part ofthe arch at I. Through the hot-air chamber passes the end of the flue Jand through the partitioirwall, and terminates in open communicationwith the fire-place. The flue is also in open relation with the hot-airchamber G by means of the perforations a in the end of the flue passingthrough the chamber, as shown in the drawings.

The foraminous end of the flue is oval in shape, as shown in Fig. 4,which represents a cross-section of the flue taken through the line x:0, and which may be continued of the same shape (or round) to the end Kthereof, terminating in the stack or chimney L, which may be more orless distant from the furnace. The end K of the fine is oval and of theshape nous diaphragm, N, through which the end of the flue passes, asshown in the drawings.

Further attention will be called to this part of the flue hereinaftelx,The side wall, 0, of the furnace 'is penetrated by air-pipes 1, 2, and3, which enter the fire-place above the arch E, as shown in Fig. 2. Itwill be observed that the inner ends of the air-pipes extend to andterminate in the hot-air chamber, the pipe 1 below the end of the flueJ, and the pipes 2 and 3 at or near the side thereof. at is also anair-pipe piercing the wall of the furnace, and terminating in thefire-place, instead of in the hot-air chamber. The opposite wall of thefurnace is in like manner pierced with air-pipes 1, 2, and 3,correspending to the air-pipes above described, and which also terminatein the chamberGin the same way. 4 is also an air-pipe corresponding tothe air-pipe 4, and in like manner terminates in the fire-place, butalittle nearer the front than the pipe 4, as seen in Fig. 1. Below thegrate-bars is arranged an air-pipe, A, extending from the outside of thefront of the ash-pit back to the rear end thereof, as shown in Fig. 2.In the rear wall of the ash-pit are perforations e, to which is applieda perforated slide or damper, cl, for opening and closing the saidperforations, as maybe desired.

B is the door of the furnace, hinged thereto at 0. To said door issecured a chute or hopper, D, covering the opening E, through which coalis fed to the furnace from the chute.

F is a slide arranged vertically in the chute before the openingE, bywhich said opening is opened and closed for transmitting coal from thechute into the furnace.

G is a lid covering the end of the chute.

Having described the construction of the furnace and the applianceadapted thereto for consuming smoke, the practical working of the sameis as follows: The hopper or chute D is supposed to be filled with coalthrown therein through the end thereof, the lid G being opened for thatpurpose. The coal from the chute is fed into the furnace by] raising theslide F, under the lifted end of which it passes slowly in onto theincandescent bed of coals, thereby avoiding the necessity of opening thedoor of the furnace for supplying it with fresh fuel, and which alsoprevents a rush of cold air into the furnace, which would be the case ifthe door were opened. As the smoke and eliminated gases pass from thebed of incandescent coals up to and over the arch E, as indicated by thearrows, they are supplied with air, to cause their combustion, by meansof the pipes 4 and 4. A further supply of air is furnished to continuethe consumption of the smoke and gases through the perforations to ofthe fine. The air for this purpose is from the hot-air chamber G, andwhich is in a highly-heated state, it having become so in passingthrough the pipes 1, 2, 3, &c.,which are heated by the furnace, so thatthe cold air entering the pipes from the outside becomes heated to ahigh degree when discharged into the chamber G, and which escapestherefrom into the flue J, through the perforations, in small jets orcurrents. The heated air thus broken up in passing through theperforations mingles intimately with the smoke and gases that may passinto the flue; hence results a more complete consumption of the smoke,820. Should any remain unconsumed at this point for the want ofsuflicient air, a further supply is had to meet that want at the end Kof the flue. The airis supplied at that point through the foraminousdiaphragm N in fine jets,whieh at once commingles with the smoke andgases (should there be any issuing from the flue) and completes theconsumption thereof. The smoke, &c., that may be issuing from the end Kof the flue into the stack L is of a wide fan shape of no greatthickness by virtue of the peculiar form of the end of the flue, so thatthere is an immediate and intimate commingling of the air and the smoke,for the purpose I above specified.

The object of the pipe A is to convey air to the rear end of the gratesin the event the structure of the furnace is such that the airholes 6cannot be made available for that purose.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In combination with the fire-place of a steam-boiler furnace, ahot-air chamber situate at the rear end of said furnace and above thecrown or arch thereof, which has an inclined grade upward from the rearto the front of the furnace, air-pipes 1- 2 3 and air-pipes 1 2 3,respectively, penetrating the side walls of the furnace into thefire-place thereof above the arch, and extending therefrom into thehot-air chamber, in which they terminate, substantially as described,and for the purpose set forth.

2. The fine J, having its outer end contracted at b b and its inner endprovided with perforations a a a and opening into the fire-box, incombination with the hot-air chamber supplied with hot air by means ofthe series of pipes arranged .on each side through the walls, in themanner described, and for the purpose set forth.

3. The flue J, having its upper end terminating in a slot shape opening,0, formed by the inward-projecting sides of the end of the flue, incombination with the stack or chimney provided with a foraminousdiaphragm through which the flue passes, substantially as set forth, andfor the purpose specified.

4. Arranged in relation to and in combina tion with a steam-boilerfurnace or fire-place thereof, the inclined arch E, air-pipes 4 and 4,terminating in said fire-place, hot-air chamber, and side pipesextending from the outside of the furnace into the fire-place, thence tothe hot-air chamber, in which they terminate, flue, J, having theperforations in the end thereof in open relation with the said chamber,and the open end of the flue terminating in the fire-place of thefurnace, and the upper end provided with a slot-like opening, 0, andinturned sides forming an arch on each side of said opening, stack, orchimney, having a perforated diaphragm through which the end of the fluepasses, all constructed substantially as described, and for the purposeset forth.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE W. MEARS.

' Witnesses J. H. BURRIDGE, THos. Y. MEARS.

